Abstract
AbstractThe system benzophenone/N,N‐dimethylaniline (DMA) representing a typical Type‐II photoinitiating system is irradiated in the presence of 1,1‐di(p‐tolyl)ethylene (DTE) as a non‐polymerising model substrate. In the presence of DMA the excited triplet state of benzophenone is not quenched by DTE and N‐[3,3‐di(p‐tolyl)propyl]‐N‐methylaniline is isolated as the major product, indicating the DMA derived radical as the main initiating species in such Type‐II systems. The mechanism of the reaction and its implications are discussed.
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